Traxxas Series 3 Power Cells provide a great balance of price and run time.
A powerful Traxxas 7-cell 8.4V pack is the most cost-effective way to
instantly increase top speed by 5mph or more with no other modifications.
The 7-cell hump pack fits in all Traxxas models except E-Maxx@ and E-Revo@,
which require a stick pack configuration.